Linux ARM Cross-Compile recipe

scripts/slave/recipes/chromium.expected/full_chromium_chrome_Google_Chrome_Linux_x64.json

 [
   {
     "abort_on_failure": true,
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/bot_update.py",
       "--master",
       "chromium.chrome",
       "--builder",
@@ skipping 95 matching lines @@
   {
     "cmd": [
       "python",
       "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
       "[SLAVE_BUILD]/src/testing/buildbot/chromium.chrome.json",
       "/path/to/tmp/json"
     ],
     "name": "read test spec",
     "~followup_annotations": [
+      "@@@STEP_TEXT@path: [SLAVE_BUILD]/src/testing/buildbot/chromium.chrome.json@@@",
       "@@@STEP_LOG_LINE@json.output@{}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/cleanup_temp.py"
     ],
@@ skipping 34 matching lines @@
       "--json",
       "/path/to/tmp/json"
     ],
     "name": "checkdeps",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@[]@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   }
 ]